Other Income (Narrative) (Details) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Other Income [Line Items]
Proceeds from Insurance Settlement, Investing Activities					$ 567,000
Other income (expense)	$ 34,000	$ 279,000		$ 36,000	$ 582,000
Tower in Des Moines Iowa [Member]
Other Income [Line Items]
Proceeds from Insurance Settlement, Investing Activities		290,000	$ 250,000
Other income (expense)		$ 290,000	$ 250,000			$ 540,000